Caston piston
US6739239B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jun 8, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J1/001
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to a molded piston, in particular an injection-molded piston (1) of fiber-reinforced plastic, which is seated slidably in a receiving bore (2) of a housing (4) and is embodied as a cup-shaped body with a piston bottom (6) and a sleevelike piston wall (8) protruding away from the bottom, and the face (10) of the piston bottom (6) pointing away from the piston wall (8)is pressure-loadable, and there is at least one injection point (46) oriented with a molding channel of a molding tool.The invention proposes that the injection point (46) is disposed on the other face (22) of the piston bottom (6), that is, the face pointing away from the pressure-loadable face (10), and the piston bottom (6), because of one or more recesses (48) present in this face (22), has a lesser wall thickness in the region of the injection point (46) than in the regions (52) adjoining it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.